It said 92% of all UK postcode areas have more than two petrol stations less than 10 minutes away.

BBC: 'Big drop' in UK petrol stations as fuel reserves fall

No 10 says there are anti-spam measures and people who want to sign a petition have to give an e-mail address and a UK address including postcode, or an overseas address.

BBC: NEWS | UK | UK Politics | Hunting support tops e-petitions

Few online companies would agree to post goods to the UK territory in the South Atlantic because it did not have a postcode.

BBC: NEWS | UK | First postcode for remote UK isle